Straight-Line Detection with the Hough Transform Method Based on a Rectangular Grid

This paper deals with the reduction of straight-line detection time with the standard Hough transform method. The number of processed pixels is reduced and therefore contributes to improve the processing time. In a preprocessing step, the image is divided into rectangular boxes and only boxes with a certain percentage of high intensity pixels are considered in computing Hough transform. The proposed method is evaluated with examples for edge detection in Lena image. The main purpose is to show that how straight-line detection can be done rapidly.